Edexcel IGCSE Physics 復(fù)習(xí)筆記 2.3.3 Electrical Safety Electrical Safety Mains electricity is potentially lethal Potential differences as small as 50 V can pose a serious hazard to individua...
Edexcel IGCSE Physics 復(fù)習(xí)筆記 2.3.2 Calculating Energy Transfers Calculating Energy Transfers Work?is done when charge flows through a circuit Work done is equal to the?energy transferred &...
Edexcel IGCSE Physics 復(fù)習(xí)筆記 2.3.1 Electrical Power & Fuses Electrical Power Power is defined as The rate of energy transfer or the amount of energy transferred per second  ...
Sinusoidal Models What are the parameters of a sinusoidal model? A?sinusoidal model?is of the form The?a?represents the?amplitude?of the function The bigger the value of?a?the bigger the?range?of v...
Edexcel IGCSE Physics 復(fù)習(xí)筆記 2.2.5 Electrical Components Thermistors & LDRs Thermistors A thermistor is a temperature-dependent resistor It is represented by the following circuit symbol: The...
Edexcel IGCSE Physics 復(fù)習(xí)筆記 2.2.4 IV Graphs IV Graphs As the potential difference across a component is increased, the current also increases This is because potential difference and curr...
Direct Variation What is direct variation? The graphs of these models always?start at the origin How do I solve direct variation problems? Worked Example b)Find the time it takes to order a list of...
Exponential Models What are the parameters of an exponential model? An?exponential model?is of the form Where e is the mathematical constant 2.718… The?c?represents the?boundary?for the function It...
Edexcel IGCSE Physics 復(fù)習(xí)筆記 2.2.3 Resistors in Series Resistors in Series When two or more resistors are connected in series, the?total?(or?combined)?resistance?is equal to the?sum?of the...
